Heating-stove.



No. 7|0,460. Patented oct. 7, |902.

J. B. HOWARD.

HEATING STOVE.

(Application led Jan. 4, 1902.)

@ @www No. 710,460. Patented 0ct. 7, |902.

' J. B. HOWARD.

HEATING STOVE.

(Application led Jan. 4, 1902.) (No Model.) 3 Smets-Sheet 2.

' ZM A,

W/ TNE SSE S ATTORNEYS No.. 7|o,4eo. Patented' oct. 7, |902.

' J. s. HowAnn.

HEATlNG STOVE.

(Application led Jan. 4, 1902.) (No Model.) 3 Sheets-Sheet 3.

UNITED STATES PATENT OFFICE.

JAMES BARZILLAI HOIVARD, OF' INDIANAPOLIS, INDIANA.

H EATING STOVE.

SPECIFICATION formingpart of Letters Patent N o. 710,460, dated October7, 1902.

Application filed January 4, 1902. Serial No. 88,448. KNO model.)

T0 @ZZ 107mm, t mfr/y concern:

Be it known that. I, J AMESBARZILLAI How-V AR'D, a citizen of the UnitedStates, residing at Indianapolis, in the county of Marion and State ofIndiana, have invented certain new and useful Improvements inHeating-Stoves; and I do hereby declare the following to be a full,clear, and exact descriptionof the iuvention, such as will enable othersskilled in the art to which it appertains to make and use the same.

The present invention is an improvement u pon the construction ofheating-st oves shown and described in Letters Patent of the UnitedStates issued to me June 13, 1899, bearing No. 629,997.

The object of the present invention is-to provide a construction wherebythe air can be more highly heated preparatory to its delivery to thecombustion-chamber and the delivery of hot air to the combustion-chambercontrolled. To accomplish this, I provide three air-chaxnbers-first, apreliminary airwarming chamber around the ash-chamber; second, anair-heating chamber around the fire pot, the air-warming chambercommunicating with the air-heating chamber Ithrough a contractedpassage, and, third, a hot-air reservoir circumamhient the top of thelirepot, a ring-valve being provided between the ai r-heating chamberand the hot-air reservoir to regulate the supply of hot air to thereservoir, and consequently to the smoke and gases to be consumed risingfrom the fuel.

In the accompanying drawings, illustrating the improvements, Figure l isa central vertical section taken on a plane passing through the frontand back of the stove, the top of the stove being omitted. Fig. 2 is acentral vertical section taken on a plane at right angles to the planeon which Fig. l is taken and.

looking toward the fron-t or air-supply side of the stove. Figi? isahorizontal sectional view taken on a plane just above the grate. Fig.el. is a similar View taken on a plane slightly above the air-outlets ofthe hot-air reservoir. Fig. 5 is an edge view of the hot-air reservoir,the valve-ring removed. Fig. 6 is a plany View ofthe saine.

In the several views, l denotes the ashchamber.

2 is the fire-pot, and 3 the grate for sustaining the fuel in thefire-pot.

The ash-chamber has an adjustable valvedamper la, admitting air tosupport combus tion of the fuel on the grate. Surrounding theash-chamber on three sides is an air-warming chamber 4, having openingson opposite sides of the airopeningl to the ash-chamber provided withadjustable Valve-dampers 4h Surrounding the Vfirepot is an air-heatingchamber 5, there being a narrow or contracted opening 5@ `between thechambers 4 and 5. The air-heating chamber 5 extends entirely around thefire-pot. Above the air-heating chamber 5 is an annular hot-airreservoir 6, bulginginward over the lire-pot and provided at its underside with a series of vents 6 to direct the hot air into the smoke andgases rising from the fuel.

Between the air-heating chamber 5 and the hot-air reservoir b' is aperforated annular shoulder or septum 7, on which slides an annularperforated ring-damper 7, having a handle, by which it can be moved,projecting through a slot to the exterior of the stove, so that the iiowof hot air from the air-heating chamber to the reservoir G can be nicelyregulated.

The air-supply for the fuel on the grate is entirely separate from andindependent of the air-supply for the air warming and heating chambersand reservoir, the vertical Walls lb and horizontal wall lc beingprovided for the purpose.

From the foregoing it will be observed that the supply of air to theunder side of the fuel can be regulated to suit the rapidity ofcombustion desired, and the supply of hot air injected into the smokeand gases can be regulated to suit the quantity to be consumed; but toeffectively do this the two supplies must be regulated to each other.Because of the comparatively narrow channel of communication between theair-Warming chamber 4 and the air-heating chamber 5 large volumes ofinsufficiently-warmed air cannot be admitted to the chamber 5, andconsequently a supply of uniformly-heated air in the reservoir G isinsured. In4 other words, the progress of air throughthe air-heatingchambers is retarded, so as to insure thorough heating of the air in thechamber 5. The hot air iiowing from the reservoir 6 can be regulated bythe ring-damper to accord exactly with that required to eect aconsumption of the smoke and gases. This matter of insuring a hightemperature of the air injected into the smoke and gases is important,because such smoke and gases can only be consumed by theinterminglingintimately therewith air in sufficient quantity at a hightemperature.

With this invention the many evils of the smoke nuisance are eliminatedor mitigated Without expensive appliances.

What I claim, and desire t0 secure by Letters Patent, is-

l. In a heating-stove having an ash-pit and a fire-pot, a chamber forWarming air around the back and sides of the ash-pit and isolated fromsaid ash-pit, a Valved opening thereto, a chamber surrounding thelire-pot for heating air, a contracted opening connecting the said twochambers, a hot-air chamber or reservoir around the top of the fire-potand discharging thereinto, a contracted opening connecting the aforesaidair-heating chamber and the last-named chamber or reservoir and a damperarranged to control said contracted opening, substantially as described.

2. In a heating-stove having an ash-pit and a re-pot, a chamber forWarming the air around the back'and sides of the ash-pit and isolatedfrom said ash-pit, a valved opening

